H 2 T-Active Injection is a combination medicine that is used in the treatment of nutritional deficiencies. It helps in the growth and development of the body and replenishes the body's stores of important nutrients. H 2 T-Active Injection is given as an injection under the supervision of a doctor and should not be self-administered. The dose and how often you take it depend on what you take it for. Your doctor will decide how much you need to improve your symptoms. You should keep taking the medicine as long as it is prescribed to you.Common adverse reactions associated with H 2 T-Active Injection include nausea, vomiting, diarrhea, and injection site reactions, such as pain, swelling, and redness. Rarely, hypersensitivity reactions, including rash, itching, and anaphylaxis, may occur. Patients should be advised to report any unusual symptoms promptly.Before receiving H 2 T-Active Injection, let your doctor know about all the medicines you are taking to make sure it is safe for you. H 2 T-Active Injection is contraindicated in patients with a known hypersensitivity to any of the active ingredients or excipients. It should not be used in patients with cobalt or cyanocobalamin allergy. Additionally, it is contraindicated in patients with megaloblastic anemia due to vitamin B12 deficiency without concurrent folate deficiency.